Water-tube boiler



sep`151, 1925. Re, 16,150

J. E. BELL WATER TUBE :5011.111:

Original Filed July 8, 1902 2 sheets-shed 1 l INVENTOR.

A TTORNEYJ Sept; 1, V11925. l f Re. 16,150 *l J. E. BELL WATER TUBEBOILER Original Filed July 8, 1907 2 Sheets-Shut 2 INVENTOR.

A TT ORNE YS 20' gases are closely y 59 grate.`

UNITEDv STATES JCHN E. BELL,

PANY, OF NEW YORK, N. YL. A

, WATERJiu-m11-v Borana.

(.'ri'ginal No. 1,129,538r',`

reissue flleluly 1, 1921. Serial' No. 481,933. f

To all whom it may cor/neem.' Be it known that I, JOHN E. BELL, acitrzen of the United States, residing' at New York, borough ofBrooklyn, in the county of Kings and State of Newy York, have inventedcertain new and useful Improvements in Water-Tube Boilers, ofwhich thefollowing is a specification, reference ghe-lng had to the accompanyingdrawings,` 1n

v whichv i Figure 1 is a sectional side elevation showring one form ofboiler constructed, inn aecordance with my invention;vv and Figs` 2 and3 are diagrammaticsectional side elevations showing modified forms. i

y The invention relates to boilersof the transverse-drum, multiple-bank,serialpass type, and is designed to provide an improvedjarrangement ofbailii-ng whereby the heldin contact with the tubes. yIt lis alsodesigned to increase the amount of heating surface exposed-*to radi--ant heat. A A further object ifs to Ibank of tubes and insure a.

the gases. Y InFig 1 of high velocity of the drawings, I show inventionas applied to a four-drum, tlrree-y bank Stirling type of boiler. Inthis case, 2', 3 and 4 are upper transverse steam and waterdrums,connected by banks off tubes 5, 6 and 7 with a lower transverse" mudgdrum'` 8. Two' or three transverse mud drums may be employed, veither oralli of'whieh may be connected by rows of'tu'bes.

curved`` at their ends, struck up so as to employ' straight tubes. lIn

'I the form shown, 9 are'y `waterei-rculat'orsv oon- 403 necting thewater spaces ofv the two frontA and 10 and* 11 are steamein" culatorsleading thesteamfrom the fronti" whence it is on. "Ihave' shown thefiont'bank forwardly over the com lb u'stion chamber, this combustion'chamber openv in its upper portion sofas. Jfront wallI of' the!settingto the*l lupper drums,

and rear drumst'o the middley drums,

455 of tubesrv as leaning `being freely to; exposethe heat, noroof orIarchbeing used-foyer'. the

Such 'ployed within the scope of my broader claims relating tothebaflling'. In this form, therefractoryv ballingc'onsists of a baille 125extending upwardly from' the mud drumv` orBRooxLYN, Yoan, AssIGNoB ToBABcocx a wrncox com slated Februar-'$123, 1915, Serial No.'382,588,filed July 8, 1907.` Application. for

I downwardly along the rear of the front the front bank of tubes, thenceupy the mid- .heated, land the gases Wil-l be exposed to Y decreaseliability to heated fire brick to substantially the same .25 theformation of steam pockets in `vthe front commonly employed. in boilersof this type.

The tubesmay bev or lthe drums' may bei i .the front bankwhich= are inthe vrear of the arch may, however, be ern Re. 16,150 PATENT oFFicE.

ooR'roRA'rIoN or NEW' JERSEY.

between,l the-.lirst and second. row of the front bank o-f tubes.' TheneXt baille 13 ex-V tends from' the upper-steam and water drum bank ,ofvtubes, being preferably supported by tension rods 14. The third baffle15 extends al'ong the rear of the second bank of tubes vnth an openingover its upper end, a shelf 16 vbeing employed to hold the gases withinthe" rear bank 7 in their last down pass to'the'off-'take port 17 I haveshown -the .water as fed into the rear upper dru'm through pipeA 18. lInthe operation of the boiler, the gases flowgup the front row of tubes ofthe frontban-k, thence down among d-le bank, and 4dtfwn. the rear bankto the outlet flue. With the form of furnace shown, the size of thecombustion chamber is increased, the `smoke'reduced. to a minimum, andincreased economy obtained.. The front Wall of the boiler setting will.become highly extent as with the arch or roof construction In thepresent form, the f -ront row of tubes is exposed to the radiatingsurface formed by the Y frontv wall, lthus increasing the amount ofradiant heaft received by thetubeheating surface.v As the furnacer`gases enter the front bank of tubes near. their upper ends, the: steam:will bemost rapidly generatedin this upper portion ofthe tubes, and hasonly7 a short distance to tra-vel into the front upper drum.; `Thisgives less liability toT the form-ation'of steam pockets andpossible'reversing of circulation. The tubes of frontv baille receive the gasesnear their .upperends at. thetirstcont'act thereof, and the .majorportion: of' the steamin these tubes is generated:` in their" upperparts; whereas with the old stylel baffling, the most ofA the steam wasproduced in thezlower portions of the tubes where the steam. mightreadily pass to the mudr'drum rather: than flow up through the tubes4 tothe steami andfl water drum.. In. thev front row of tubes of thefr'ontba'nk, the production of steam inV the lower portion is of coursenot diminished' in the forma off'Fig.` 1, but .as there is more steamgenerated. in the upper portion off the bank' there is= less liabilityfor 'reversal of circulation. It also gives a narrow pass through whichthe gases must flow at high velocity, insuring the maximum amount ofheat being absorbed per square foot of heating surface. The furnace maybe employed for coal, oil sprays, or any other desirable fuel.

In Fig. 2 I show a form similar to that of of hollow bricks or tileswhich incloses the front row of tubes. In this case the front row willonly be directly exposed to the gases above the end of the baiiie. Inthis form parts similar to those of Fig. 1 are designated by similarnumerals with the letter a applied.

In Fig. 3 I show a form similar to that of Fig. 1, except that the frontbaffle is obtained by bending portions of the second row of tubes 5binto the spaces between the front set of tubes along'the baing portions.The upper portionsof the second row being in their normal position willallow the gases to flow through' after they reach the upper end of theforwardly bent portions.

By the words baffle element in m claims, I intend to cover any form ofba fling device, not only such as those I have shown, but all otherforms. I also intend, in my claims, to cover the structure whether oneor more mud drums or lower water spaces is used. f

The tubes may be straight or curved; the number of steam and water drumsor mud drums may be varied; two or more vbanks of tubes may be used; andmany other changes may be made without departing from my invention.

By the word group I mean to include all the tubes located betweenbaflies or between a baffle and a setting wall, and forming heatingsurface, irrespective of the particular upper drum or drums to whichthey y are connected.

I claim 1. A transverse-drum, serial-pass, multiple-bank boiler havingthree upper drums directly connected to a lower drum by groups of tubesall forming heating surfacer and arranged in fan shape,'the front groupincliningupwardly and forwardly over theY 1 combustion chamber andfacing the-front setting wall, and baffling arranged to give the gases afirst upward `pass longitudinally of the front group and thence downlongitudinally of and over a group of tubes hav-4 ing greater heatingsurface than that of the front group, thence upwardly longitudinally ofa group of tubes connected to the middle upper drum, and thencedownwardly over another group of tubes. l

2. A transverse-drum, serial-pass, multiple-bank boiler having threeupper drums directly connected to a lower drum by groups of tubes allforming heating surface furnace chamber being and arranged in fan shape,the front group inclining upwardly and forwardly over the combustionchamber and facing the front setting wall, and baffiing arranged to givethe gases a first upward pass longitudinally of the front group andthence `ldown longitudinally of and over a group of tubes having greaterheating surface thany that of the Fig. 1, except that the baffle l2a iscomposed Vf ront group, thence upwardly longitudinally of a group oftubes connected to the middle upper drum, and thence downwardly overanother group of tubes connected to the rear upper drum.

3. In a vertical water tube boiler, the combination with a combustionchamber, transverse upper steam and water drums, a lower mud drum, and aplurality of banks of upwardly extending. tubes, e-ach bank connectingone of the upper drums with the lower drum, the front bank incliningupwardly and forwardly over the combustion chamber and facing the frontsetting wall, of a front baflie extending upwardly and longitudinallyalong the first bank from the lowerv end and at the rear of some of thetubes thereof, and terminating short of the upper end thereof, saidbaffle constituting the rear wall of said' combustion chamber and theexit from said combustion chamber being over said baffle and among theupper end of the first bank of tubes, and a second baiile extendinglongitudinally along the rear of said first bank from the upper endthereof, and terminating'short of the lowerk end, the major portion ofthe tubes in the first bank being located between the first and thesecond baliles, said baffles thereby compelling the heated gases tofirst enter the upper end of the first bank and then traverse the saidfirst bank longitudinally downwardly from its upper to its lower end andcounter to ther circulation in the tubes of said bank, substantially asdescribed.

4. In a vertical water tube boiler, the combination with a combustionchamber, transverse upper steam and water drums, a lower mud drum, and aplurality of banks of up- Wardly extending tubes, each bankconnectingone ofthe upper drums withV the lower drum, ythe front bankinclining upwardly and forwardly over the combustion chamber and facingtheffront setting wall, said substantially unobstructed, of a frontbalile extending upwardly and longitudinally along the first bankfromthe lower end and at the rear of some of the tubes thereof, andterminating short of the upper end thereof, said bafiie constituting therear wall of said combustion chamber and the exit from said combustionchamber being over said baffle and among the upper end of the first bankof tubes, and a second baffle extending longitudinally along the rear ofsaid first bank from the upper end thereof, and terminating short of thelower end, the ina-jor portion of the tubes in the first bank beinglocated between the .first and the second baffles, said baffies therebycompelling the heated gases to first enter the upper end of the firstbank and then traverse the said first bank longitudinally downwardlyfrom its upper to its lower end and counter to the circulation in the,tubes of said bank, substantially as described.

5. A transverse-drum, serial-pass, multiple-bank boiler having the banksprovided with baffles, the bank with which the flame and hot gases firstcontact supporting a baiile in the rear of some of the tubes of the bankand in front of the major portion of the tubes thereof, said balileforming the rear of the combustion chamber; substantially as described.

6. A transverse-drum, serial-pass, multiple-bank boiler having the banksprovided with bafiles, the bank with which the flame and hot gases firstcontact supporting a bafiie at the front of said bank and in the rear ofsome of the tubes thereof and having a bafhe at the rear of said bank,the major portion of the tubes of the bank being located between saidbaffles; substantially as described.

7. A steam boiler having a plurality of upper transverse steam` andwater drums, a lower transverse mud-drum, banks of tubes connecting saidupper and lower drums, a furnace, the first bank of tubes having twobafiies supported by the tubes, one of said baffles being at the frontand in the rear of some of. the tubes of the bank and extending upwardto the upper part of the bank and forming the rear wall of the furnacecombustion chamber, and the second of said bafiies being at the rear ofthe first bank of tubes to cause the gases to ow downward over the firstbank, the major portion of the tubes in said bank being located betweenthe first and the second bafiies; substan- Lially as described.

8. A transverse-drum, serial-pass, multiple-bank boiler, comprisingthree upper drums connected to a lower water compartment by fourv groupsof tubes arranged in an shape, a combustion chamber which is at leastpartly overhung by the front group of tubes, baffling comprising abafiie extending upwardly back of the Jfront group to a point short ofits upper end, a bafiie extending from the upper end of the second groupdownwardly to a point short of its lower end, and a baffle extendingupwardly back of the third group to a point short of its upper end,whereby the gases f'low in four up and down passes and downward over thelast pass.

9. A transverse-drum, serial-pass, multi- .ile-bank boiler, comprisingthree upper drums connected to a lower water compartment by four groupsof tubes arranged in fan shape, a combustion chamber which is at leastpartly overhung by the front group of tubes, baffling comprising abafiie extending upwardly back of the front group toa point short oi'its upper end, a baie extending from the upper end of the second groupdownwardly to a point short of its lower end, and a bafiieextendingupwardly back of the third group to a point short of its upper end,whereby the gases f'low in four up and down passes and downward over thelast pass, the combustion chamber overhung by the front group of tubesbeing unobstructed and the tubes directly facing the front setting wall.

JOHN E. BELL.

